You know you're hooked when you're looking for your first house with your new wife and veto all the ones where, "There's no place to fit my reloading press and all my components."
You know you're hooked when you start picking up brass for calibers you don't even own guns for, just on the chance that if you do get one you'll have brass to reload for it (BT/DT). Extra credit if you actually reload that brass before you have a gun for it (no, I'm not that bad - yet).